Screen-holder for photographic cameras.



(Application filed Se'pt. 28, 1898. Renewed May, 4, 1901.)

Hm *Hmmm No. 688,080. Patented Dec. 3, |90I.

E. E. FLORA.

SCREEN HOLDER FOR PHOTOGRAPHIE CAMERAS.

(Application led Sept. 26, 1898. Renewed May 4, 1901.)

(No'llodel'.) 3 Sheets-Sheet 2.

Patented Dec. 3, |90I.l

No. 688,080. A

E. E. FLORA.

SCREEN HOLDER FOR PHDTOGRAPHIC CAMERAS.

(Applctioxi led Be`pt. 2B, 1898. Renewedk May 4, 1901.)

(No Model.) 3 Sheets-Sheet 3.

UNITED STATES PATENT OFFICE.

ELLSWORTI'I E. FLORA, OF CHICAGO, ILLINOIS, ASSIGNOR TO DVIGII'I K.TRIPP, OF CHICAGO, ILLINOIS.

SCREEN-HOLDER FOR PHOTOGRAPHIC CAMERAS.

SPECIFICATION forming part of Letters Patent No. 688,080, dated December3, 1901.

Application filed September 26, 1898. Renewed May 4, 1901. Serial No.58,810. (No model.)

To all wil/077e it may cm2/cern.'

Be it known that I, ELLsWoRTH F.. FLORA, a citizen of the United States,residing at Chicago, Illinois, have invented certain new and usefulImprovements in Cameras, of which the following is a specification.

My invention has more special reference to the mechanism or devices forholding a screen in contact with a sensitized plate in a camera used incolor photography; and my invention consists in the features and detailsof construction hereinafter described and claimed.

In the drawings, Figure l represents a side elevation of a portion of acamera; Fig. 2, a transverse sectional elevation taken in the line 2 ofFig. 4; 3, a similar view with the parts adjusted to differentpositions. Fig. et is aview in elevation of the back of the cameraremoved. Fig. 5 is a broken plan sectional view taken in line V5 of Fig.2. Fig. Gis a perspective view of the lever mechanism and parts foradjusting the screen. Fig. '7 is a perspective view of a detailedportion of the frame, and Fig. 8 is a perspective view of modiied levermechanism.

In making my improved mechanism for holding a screen in place against asensitized plate in a camera I employ a camera A of any desiredconstruction. This camera is provided with a back B, adapted to receivea dry-plate holder C of ordinary construction, in which sensitizedplates c and c are placed, as is usual. These plates will loe separatedby a septum or partition c and provided with slides c2 and c2 in theusual way. A ground glass D may be employed for focusing, as usual; butI may say, in brief, that in all these various details the usualfeatures of construction may be employed, if desired, and I need notstop to describe them with greater minuteness.

Coming now to the particular improvements constituting my invention, Iarrange a rectangular frame E, fastened to the back in any suitablemanner, so as to hold it in place. This frame is intended as ascreenholder. As shown in the drawings, I have fastened this frame tothe back by means of leaf-springs E, which are attached to the frame byrivets e, as shown in Figs. 4 and 5, or in any other desired Way, and Ithen attach the springs to the back by means of clips or lugs e', asshown more particularly in Fig. 1i. This causes the frame to hang in theback at a desired position and permits it to be moved as may be desired,so as to advance it toward the sensitized plate or draw it therefrom. Inthis frame is arranged a screen F, as shown particularly in Figs. 2 and3. This screen may be held in the frame in any desired Way, though, asshown in Figs. 2, 3, and 4i, I have notched the frame at intervals andbent a portion fout, so as to receive and hold the screen, as shown inFigs. 2 and 3. In order to move the frame with the Screen toward or fromthe sensitive plate, I employ an arm H, mounted upon a shaft h, which isheld in the back so that it may be turned by the arm. The inner end ofthe shaft is attached to a plate H,which is provided with a pin 7L'. Anarm I is pivoted to the plate H' at one end, as shown in Fig. 6, andcarries a link i at the opposite end. This link carries a rod K, held insuitable bearings k, as shown in Fig. et. At the other end of the rod Kis another link 'i' and another arm l', similarly pivoted to a plate H,properly mounted and fastened in the opposite end of the back by meansof a screw 012, as shown in Fig. G. This plate is also provided with apin 3, which is intended to pass through a slot i4 in the frame E. Byturning the arm H in one direction or the other the frame E with thescreen F will be advanced toward or from the sensitive plate. If now WeWithdraw the slide c2 on that side of the sensitized plate next to thescreen and turn the arm in the position shown by dotted lines in'Fig. I,the frame E and the screen F will be advanced until the screen restsagainst the sensitized surface of the sensitive plate c left exposed bythe withdrawal of the slide, so that they will occupy the positionsshown in Fig. 3. The parts are now in position for an exposure of theobject to be photographed, so that the rays of light will pass throughthe screen which rests against the sensitized surface of the platebefore acting upon the sensitive material thereof. After the exposurehas been made by reversing the movement of the arm I-I the frame E andscreen F will be moved from the sensitized plate and thrown in theposition shown in Fig. 2. Ot course if it be desired to malle a secondexposure all that is necessary is to remove the dry-plate holder, turnit over so that its other sensitized plate will be on the side towardthe screen, and repeat the operation already described. The arm H, asshown in Fig. l, is provided with a tail or extension h2. This tail oreX- tension is in the position shown in Fig. l in full lines When thescreen is moved away from the sensitized plate, as shown in Fig. 2; butafter the slide has been Withdrawn and the arm moved into the positionshown in dotted lines in Fig. l and the screen brought close up againstthe sensitized surface of the dry plate the tail or extension is thrownacross the opening from which the slide has been Withdrawn, so that theslide cannot be inserted until the lever has been reversed and thescreen moved away from the sensitive plate. This arrangementwill preventinjury that otherwise might arise from attempting to insert the slidebefore removing the screen from its position of contact with thesensitized plate.

I may say in conclusion that while I have described the arrangement ofthe parts with considerable minuteness I do not desire to be limitedthereto further than as the same may be specified in the claims; nor doI intend to confine myself to the use of my invention in connection withany particular kind of camera, as it is adapted for use with differentkinds. It may be used in those which contain dry plates, as illustratedin the drawings, or with those which employ a film as well7 thearrangements, of course, being such as to advance the screen against thelm when in its position for an exposure, in which case it is a plainsurface, the same as an ordinary dry plate.

What I regard as new, and desire to secure by Letters Patent, is-

l. In a camera, the combination of a plateholder, a movablescreen-holder, and a fiexible support for the screen-holder permittingmovements thereof toward and from the plateholder, substantially asdescribed.

2. In a camera, the combination of a plateholder, a movablescreen-holder, a flexible support for the screen-holder permittingmovements thereof toward and from the plateholder, and a lever mechanismoperable from the outside of the camera for moving the screen-holder onits ilexible support, substantially as described.

3. In a camera, the combination of a plateholder, a screen-holder,springs for holding the Screen-holder in a desired position withreference to the plate-holder, and means for moving the screen-holdertoward and from the plate-holder, substantially as described.

4. In a camera, the combination of a plateholder, a screen-holder, meansfor moving the screen-holder toward and from the plateholder, and meansfor preventing the insertion of a slide While the screen-holder is inits position toward the plate-holder, substantially as described.

5. In a camera, the combination of a plateholder, a movablescreen-holder, a flexible support for the screen -holder permittingmovements thereof toward and from the plateholder, a swinging carrierfor the screenholder and an outside arm or lever for moving the swingingcarrier, substantially as described.

ELLSIVORTH E. FLORA.

Witnesses:

D. K. TRIPP, THoMAs B. ll'IoGnEeon.

